Question

Find the 10th term from the end of the A.P., 17, 14, 11,....-40
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Answer 1

a= 17

d= -3

l= -40

n= 10

Formula= [ l- (n-1) d ]

= [-40- (10-1) -3 ]

= [ -40+ (9×3) ]

= -40 + 27

= -13

Answer 2

a= 17

d= -3

l= -40

n= 10

Formula= [ l- (n-1) d ]

= [-40- (10-1) -3 ]

= [ -40+ (9×3) ]

= -40 + 27

= -13